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  1. By: Shaffer, Jill A. - Knutsen, Gregory A. - Martin, Ron E. - Brice, Joel S.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 121
    Issue: 1
    Date: 2007-01-01
    Page Range: 46--56
    Publication Info: Ottawa Ottawa Field-Naturalists' Club